/*
 * Copyright  2003-2004 The Apache Software Foundation.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

/**
 * @author Werner Dittmann (Werner.Dittmann@siemens.com)
 */
package org.apache.ws.axis.oasis;

import org.apache.ws.security.WSPasswordCallback;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.IOException;

/**
 * Class PWCallback
 */
public class PWCallback implements CallbackHandler {

    /** Field key */
    private static final byte[] key = {
        (byte) 0x31, (byte) 0xfd, (byte) 0xcb, (byte) 0xda, (byte) 0xfb,
        (byte) 0xcd, (byte) 0x6b, (byte) 0xa8, (byte) 0xe6, (byte) 0x19,
        (byte) 0xa7, (byte) 0xbf, (byte) 0x51, (byte) 0xf7, (byte) 0xc7,
        (byte) 0x3e, (byte) 0x80, (byte) 0xae, (byte) 0x98, (byte) 0x51,
        (byte) 0xc8, (byte) 0x51, (byte) 0x34, (byte) 0x04,
    };

    /*
     * (non-Javadoc)
     * @see javax.security.auth.callback.CallbackHandler#handle(javax.security.auth.callback.Callback[])
     */

    /**
     * Method handle
     * 
     * @param callbacks 
     * @throws IOException                  
     * @throws UnsupportedCallbackException 
     */
    public void handle(Callback[] callbacks)
            throws IOException, UnsupportedCallbackException {

        for (int i = 0; i < callbacks.length; i++) {
            if (callbacks[i] instanceof WSPasswordCallback) {
                WSPasswordCallback pc = (WSPasswordCallback) callbacks[i];

                /*
                 * here call a function/method to lookup the password for
                 * the given identifier (e.g. a user name or keystore alias)
                 * e.g.: pc.setPassword(passStore.getPassword(pc.getIdentfifier))
                 * for Testing we supply a fixed name here.
                 */
                if (pc.getUsage() == WSPasswordCallback.KEY_NAME) {
                    pc.setKey(key);
                } else {
                    pc.setPassword("security");
                }
            } else {
                throw new UnsupportedCallbackException(callbacks[i],
                        "Unrecognized Callback");
            }
        }
    }
}
